At the World's Fair in St. Louis, Missouri, a Mexican man wearing a sombrero, probably Jesus Tobano, sits on a plank connected to a piece of machinery; he is holding onto two ropes and his feet are resting on two spools of copper wire. In front of...

At the World's Fair in St. Louis, Missouri, five men take turns hitting copper with mallets; they are hitting the metal which a sixth man, who is kneeling, is holding onto a block with tongs. Five of the men are wearing white sombreros. The men are...